class Solution {
public:
    int minCostClimbingStairs(vector<int>& cost) {
int n=cost.size();
vector<int> dp(n+1);
dp[0]=dp[1]=0;
for(int i=2;i<=n;i++){
dp[i]=min(dp[i-1]+cost[i-1],dp[i-2]+cost[i-2]);
}
return dp[n];
    }
};
